Which among the following is not a change noticed among children who entered teenage (boys and girls)?

 Hair growth is seen in all parts of the body: This is not typically true. While hair growth does occur in many areas of the body during puberty (such as the face, underarms, and genital areas), it does not grow in all parts of the body for everyone. For example, hair may not grow uniformly all over the body for all individuals.

 Hair growth in some parts of the body: This is a correct change. During puberty, boys and girls experience hair growth in specific parts of the body, such as the armpits, face (for boys), and pubic region. This is a normal physiological change.

 Some develop pimples: This is a correct change. Acne or pimples are common during puberty due to hormonal changes that lead to increased oil production in the skin. This is a well-known and common occurrence during the teenage years.

 Skin in many becomes oily: This is a correct change. As hormonal changes increase during puberty, the skin tends to produce more oil (sebum), leading to oilier skin, which is often associated with the development of pimples and acne.